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- 1. Multiple Choice
A satellite is in orbit around the earth. Which one feels the greater force?
the satellite because the earth is so much more massive
the earth because the satellite has so little mass
Earth and the satellite feel exactly the same force.
It depends on the distance of the satellite from Earth.
- 2. Multiple Choice
A box is placed on a table which rests on the floor. The box pushes on the table; the reaction force to the box's push on the table is the table's push on the floor.
True
False
- 3. Multiple Choice
You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front of the train. From this observation, you can conclude that this train is
speeding up.
slowing down.
changing direction.
speeding up and changing direction.
slowing down and changing direction.
- 4. Multiple Choice
You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the figure. The reaction force to your push is
the push of box G on box H.
the push of box H on box G.
the push of box G against you.
the upward force of the floor n box G.
the acceleration of box G.
- 5. Multiple Choice
A truck is using a hook to tow a car whose mass is one quarter that of the truck. If the force exerted by the truck on the car is 6000 N, then the force exerted by the car on the truck is
1500 N.
24000 N.
6000 N.
12000 N.
- 6. Multiple Choice
A person is using a rope to lower a 5.0-N bucket into a well with a constant speed of 2.0 m/s. What is the magnitude of the force exerted by the rope on the bucket?
0.00 N
2.0 N
5.0 N
10 N
- 7. Multiple Choice
The acceleration due to gravity is lower on the Moon than on Earth. Which one of the following statements is true about the mass and weight of an astronaut on the Moon's surface, compared to Earth?
Mass is less, weight is the same.
Mass is the same, weight is less.
Both mass and weight are less.
Both mass and weight are the same.
- 8. Multiple Choice
Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal 100-N pull, as shown in the figure. Both of them are moving together at a constant velocity of 2.0 m/s to the right, and both weigh the same.
Which of the figures below shows a correct free-body diagram of the horizontal forces acting on the upper block, A?
- 9. Multiple Choice
Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal 100-N pull, as shown in the figure. Both of them are moving together at a constant velocity of 2.0 m/s to the right, and both weigh the same.
Which of the figures below shows a correct free-body diagram of the horizontal forces acting on the lower block, B?
None of these diagrams is correct.
- 10. Multiple Choice
What is the mass of an object that experiences a gravitational force of 700 N near Earth's surface where g = 10 m/s2?
0.7 kg
0.07 kg
70 kg
7000 kg
- 11. Multiple Choice
If I weigh 800 N on Earth at a place where g = 10 m/s2 and 6000 N on the surface of another planet, what is the acceleration due to gravity on that planet?
75 m/s2
80 m/s2
60 m/s2
7.5 m/s2
- 12. Multiple Choice
A net force of 125 N is applied to a certain object. As a result, the object accelerates with an acceleration of 25.0 m/s2. The mass of the object is
3000 kg
400 kg
0.2 kg
5 kg
- 13. Multiple Choice
What magnitude net force is required to accelerate a 1000-kg car uniformly from 0 m/s to 25.0 m/s in 10.0 s?
2.5 N
2500 N
400
0.0025 N
- 14. Multiple Choice
An object that weighs 70 N is pulled on a horizontal surface by a horizontal pull of 51 N to the right. The friction force on this object is 30 N to the left. What is the acceleration of the object?
0.3 m/s2
1.16 m/s2
3 m/s2
11.6 m/s2
- 15. Multiple Choice
The figure shows an acceleration-versus-force graph for a 500-g object. What should be the value of the first tick-mark on the vertical scale, as indicated by the arrow in the figure?
1
0.001
250
0.25
- 16. Multiple Choice
The figure shows an object's acceleration-versus-force graph. What is the mass of this object?
2.5 g
1.6 g
630 g
2.5 kg
- 17. Multiple Choice
If the box shown has a mass of 3 kg, its acceleration will be
1 m/s2 to the left
1 m/s2 to the right
6.3 m/s2 to the right
9 m/s2 to the right
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